Control Unit: Description and Operation

This system looks/frees the rear differential by operation of the rear diff. lock SW.
* With the ignition SW turned ON, rear diff. lock SW ON, transfer lever in L and the speed below 8 km/h (5 mph), the relay installed in the rear diff. lock control ECU is turned ON through control of the rear diff. lock control ECU and the current flows from DIFF fuse to rear diff. lock control ECU TERMINAL 5 to TERMINAL 3 to rear diff. lock motor TERMINAL 3 to TERMINAL 2 to rear diff. lock control ECU TERMINAL 2 to TERMINAL 7 to GROUND. As a result, the rear differential look operates and the rear differential is locked. At the same time, the detection SW (Rear diff. lock ) is turned ON and the rear diff indicator light in the combination meter lights up.

* When the rear diff. lock SW is turned to OFF from ON, the relay installed in the rear diff. lock control ECU is turned ON through control of the rear diff. lock control ECU and the current flows from DIFF fuse to rear diff. lock control ECU TERMINAL 5 to TERMINAL 2 to rear diff. lock motor TERMINAL 2 to TERMINAL 3 to rear diff. lock control ECU TERMINAL 3 to TERMINAL 7 to GROUND. As a result, the rear differential look operates and the rear differential is made free. At the same time, the detection SW (Rear diff. lock) is turned OFF and the rear diff. indicator light in the combination meter is turned OFF.

The rear diff. indicator light blinks under the following conditions
* When the rear diff. lock SW is turned ON with the ignition SW ON and the transfer lever at a position other than L.
* When the rear diff. lock SW is turned ON at a speed over 8 km/h (5 mph), with the ignition SW ON and the transfer position lever at L position.
* When the rear diff. lock motor is operating the rear differential to free from lock and the detection SW (Rear diff. lock ) is OFF.